37 Service Information: Basic Information For Technical Repair Requests For Gearbox Complaints (GROUP 37, NO. 24-22)

37 SERVICE INFORMATION: BASIC INFORMATION FOR TECHNICAL REPAIR REQUESTS FOR GEARBOX COMPLAINTS

TECHNICAL SERVICE BULLETIN

SERVICE INFORMATION

37 24 22 2074826/1 August 9, 2024.

Model(s)	Year	VIN Range	Vehicle-Specific Equipment
All Audi Vehicles	2009 - 2025	All	Not Applicable

CONDITION

If there is a reporting obligation or a TSB for the customer complaint, this should be used as a priority. 

• This article contains the work steps  and basic information  which are necessary to provide the best possible technical support for queries about gearbox complaints.
• A technical repair query can only be processed if all information  is available.
• This article only provides information for submitting technical repair queries; it must not be used as workshop findings for the complaint and cannot be used for billing purposes.

TECHNICAL BACKGROUND 1

The following description is a guideline for technical enquiries about gearbox complaints.

• Are there event memory entries in the gearbox or in other relevant control units (engine, ESC, data bus diagnostic interface, etc.)?
  • If so, work though Guided Fault Finding (if there is no reporting obligation for the issue).
• Send current diagnostic log  online and make all gearbox measured values available online
• Check oil level and oil quality.
  • If swarf is visible, take photos with scale and attach them to the Doc-IT.
• Locate leaks precisely (clean > leak detection spray > test drive). Take relevant photos and upload them to Doc-IT.
• If glycol may be in the automatic transmission fluid, a glycol test can be carried out with the following gearboxes:

Manufacturer designation:	Workshop designation:
VL300/VL381:	01J/0AW
AL420/AL600	09L/0AT/09E
AL651/AL551/AL552/AL952	0B6/0BK/0D5/0D6
DL501	0B5
DL382	0CK/0CL/0CJ
DQ381	0GC

Use a commercially available glycol test such as: 

Glycol test from Hanna Instruments - article number HI 3859. 

This glycol test can be ordered via this company's website.

Internal tests have shown that glycol test with expired sell-by date lead to incorrect measurements. In most such cases, the tests indicate the presence of glycol even though there is no glycol in the ATF. 

Instead of the instructions in the test kit, the instructions attached to this TSB must be used. If the attached instructions are not used, this may lead to incorrect measurements and misinterpretation of the test result. 

• The complaint and driving situation must be described in detail (load/accelerator pedal, rpm, speed, gear (D/S/TIP/R), temperature-related: cold/warm, peripheral conditions: incline, cornering,..., frequency: always/sporadic, etc.)
• Locate noises as precisely as possible (if necessary, with different analysis tools e.g. noise case or PICO-NVH tool) and describe the affected driving situation in detail. Make a noise recording stating the recording location and attach it to the DISS.
  • For example: whistling noise at speeds between 60 and 80 km/h (37 and 50 mph) in 3rd and 4th gear under light load. The noise was recorded on the end cover of the gearbox, where it is most audible.
• For a precise noise analysis, the PICO-NVH tool is available. For noise analyses the PICO-NVH tool is recommended.
• Gearshift complaints:  Which gears are affected? What is the precise driving situation? At which gear oil temperature does the complaint occur?

• Manual gearbox: scraping noise when changing 3-->4, but only in cold condition.
• Automatic gearbox: example: One-off jerk during the automatic down shift 4-->3 in gear D when accelerating with kickdown at 70km/h (44 mph).

PRODUCTION SOLUTION

Not applicable.

SERVICE

Not applicable.

WARRANTY

This TSB is informational only and not applicable to any Audi Warranty.

ADDITIONAL INFORMATION

All part and service references provided in this TSB (2074826)  are subject to change and/or removal. Always check with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.

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